After receiving the news from the Yunnan-Guizhou Plateau from the 624 Institute, Yang Hui went straight to the Sichuan-Shu Basin overnight.

The 624 Institute is located in Fucheng, but it is concentrated in the same place as the Wind Tunnel Base and the Changhong Factory, but the problem is that because the 624 Institute is a third-line project established in a special era, it is natural to take safety as the most important point to consider, and the entire place where the 624 Institute is actually located is still in the mountainous area.

When he arrived at the 624 Institute, Yang Hui found that there were really a lot of acquaintances from Southwest Science and Industry, including Chief Wen who came back from the United States after attending the conference, and Director Bai, who was in charge of almost the entire Southwest Science and Industry Aero Engine Business, was naturally here.

There is also Xiang Qiao, the person in charge of the titanium-titanium friction exploration project hand-picked by Yang Hui, the core gold development of medium and high pressure compressors because of the breakthrough of the new process, he decisively used titanium alloy blades, and even planned to learn from the F404 engine to also use titanium alloy casing, which was naturally prevented by Xiang Qiao.

In the trial production a few months ago, the combination of titanium alloy blades and steel casing was naturally selected, although it looks a little backward, but this is at least safe.

"Director Bai, now that the project is going well, you can come here for a while, or you can tell me more specifically! This core machine carries the future of our Southwest Science and Industry, and I still have to come to join in the fun. ”

Yang Hui's arrival was not at all expected by Director Bai, and it would be strange if Yang Hui did not come. Yang Hui gave up the opportunity to build an airplane at the beginning and went to the second institute to build an engine, doesn't this still reflect Yang Hui's attention to the engine?

Yang Hui attaches great importance to the research and development of engines, which is also an aspect of Director Bai's strong recommendation that Yang Hui be the general manager of Southwest Science and Industry. Who doesn't have a little selfishness, and naturally make their own engines should also consider the future of Southwest Science and Industry Engine Industry.

Naturally, he took Yang Hui and walked towards the interior of the 624 Institute. As the supreme temple of the republic's gas turbine technology pre-research, 624 basic living facilities are not very good. Some important office and scientific research areas are even directly built in the mountains.

However, it is all in the past, after the 80s, most of the projects were moved to the outside of the cave for office and scientific research, and the most enviable to Yang Hui, and most of the core test equipment of the 624 Institute was also built at the foot of the mountain.

Still far away, Yang Hui saw a huge open-air high-altitude test bench, Director Bai had been drooling over this thing for a long time, and when he arrived at the 624 Institute half a month ago, he had an in-depth understanding of this set of the only high-altitude platform in the republic.

"There is the SB101 high-altitude test bench of the 624 Institute, due to various conditions and financial pressure. This high-altitude test bench is completely open-air construction, but this does not affect the use, not long ago Hongqi factory turbofan 9 engine to test, with the Rolls-Royce company technical staff also said that the technology of this high-altitude platform has reached the international advanced level. ”

Rolls-Royce's evaluation of the SB101 high-altitude platform, Yang Hui is not interested at all, as long as this kind of super project is manufactured, it will not be too backward, the service life is almost decades, and the demand for replacement can almost be said to be small and pitiful.

The SB101 high-altitude platform is only more than 20 years later than the old Western giants, and there will be no generation difference. Naturally, it can be the international advanced level, and what really interests Yang Hui is the cost, use cost, and of course the most important performance parameters.

"The world's advanced is naturally certain, and I would like to know the specific performance data of this high-altitude platform now. With these data, we can arrange engine tests for the performance of the high-altitude platform in a planned way, or make a reference for our Southwest Science and Industry to build the high-altitude platform by ourselves in the future. ”

The high-altitude platform at the 624th Institute has just been built. Before the follow-up finishing work was completed, Yang Hui started a new idea, and this kind of thing is definitely not good in 624.

Not only is it inconvenient to use. Moreover, with the blowout of the development of various types of domestic engines in the future, the use of high-altitude platforms will definitely be very frequent. It will even affect the development of various types of engines in Southwest Science and Industry.

Although the high-altitude platform is expensive and troublesome to maintain, this is definitely an indispensable weapon for ambitious aero-engine giants, and the perfect high-altitude platform is not only a symbol of strength, but also a symbol of status, and Southwest Science and Industry can not do without this thing.

Yang Hui began to mention the construction of Southwest Science and Industry's own high-altitude platform, which made Director Bai surprised and very excited, this is the construction of high-altitude platform! With this thing, it is definitely like a tiger with wings, but I don't know when this project will have to get the budget funds to start, and the current Southwest Science and Industry itself does not have much money!

Although he was very confused, this did not prevent Director Bai from excitedly introducing the performance data of this high-altitude platform to Yang Hui.

"The SB101 high-altitude platform is a continuous air source directly connected simulated high-altitude test bench, which can simulate the flight conditions of the airspace at an altitude of up to 25,000 meters, and can meet the needs of aviation jet engine simulation test run with an air flow of 260 kg/s under standard sea level conditions

Small bypass ratio engines with a thrust of less than 17 tons can be tested in this high-altitude platform. ”

After hearing these introductions, I have a general understanding of the performance of the high-altitude platform, at least this high-altitude platform can meet the use of the platform in the next 20 years.

As far as the current situation is concerned, whether it is a seven-ton commercial turbofan with a large channel ratio used in the MPC75 project, or a new generation of medium thrust turbofan engines with a small bypass ratio, or Taihang under development in Fengtian.

Even if you look a little further, even the next generation of 15-ton high-thrust military engines with a small bypass ratio in the future can be tested on this high-altitude platform.

That is to say, as long as the republic's aero engine does not break through the 17-ton mark, and the engine channel ratio is not too perverted, SB101 can basically meet the use, and the engines that break through the 17-ton barrier are almost all used in civilian giant intercontinental airliners.

If the republic intends to make achievements in the giant commercial engine, then the SB101 high-altitude platform will definitely not be able to meet the use, not to mention now, even in 2015, the republic can not build this kind of high-altitude platform, this high-altitude platform must reach at least 700KG/S air flow, this high-altitude platform is the symbol of the aero-engine power, can manufacture the three giants of 50-ton aero engines, which is not relying on this kind of thing to run rampant.

It is no exaggeration to say that in the development of aero engines, 20 tons is a huge threshold, if you can break through this bottleneck, then congratulations, you can already be regarded as a real aviation power.

With this level of engine, it means that your aviation industry supporting equipment has reached a new level, and the new supporting equipment can fully meet the development of 20-30 ton aero engines.

But can this kind of level really be that easy to overcome? A big thing as strong as the Soviet Union, in the end, it had no choice but to move the country's strength to just cross this threshold, and finally fell heroically, and its successor, Russia, has been able to only stop and go in the development of engines of less than 20 tons.

No matter what the situation will be in the future, the current SB101 high-altitude platform has been successfully built, which means that the Republic has entered the threshold of an aviation power, and Southwest Science and Industry must have this thing if it wants to continue to progress.

In the later generations, the footbasin chicken that made SLR was so awesome that it could only make a high-altitude platform with an air flow of 70KG/s, which is why the footbasin chicken could only keep spinning around on a small-thrust aero engine.

"It's so good, it's going to drool! We must also build this thing in the future, and in the future, our aero-engine development task will only become heavier and heavier, and it is not a matter of running to the 624 Institute all day long, and it is not as convenient for others to have it as it is to have it ourselves. ”

This is not Yang Hui's wild thoughts, the last Fengtian Institute was too busy because the SB101 high-altitude platform was too busy, and finally the state allocated funds to rebuild a set of high-altitude platforms in Fengtian, and the performance is definitely better than SB101.

Since Fengtian can get this kind of treatment, Yang Hui does not think that Southwest Science and Industry will be much behind Fengtian, as long as the two engines expected by Yang Hui continue, everything is no longer a big problem. (To be continued.) )